Frizzle feather care

Good morning everyone! Things are going so nicely around our house since the coop has been completed and the girls are in it! Thank you all for earlier help.

I just read this morning that it is important to care for the Frizzles' feathers so they do not become brittle. Unforunately, the books said nothing more. Does anyone have any information on how to properly care for our Frizzles? I welcome any and all feedback as we learn how to become good parents to our flock